抓图命令scrot

-b, --border
            When selecting a window, grab wm border too

       -c, --count
            Display a countdown when used with delay.

       -d, --delay NUM
            Wait NUM seconds before taking a shot.

       -e, --exec APP
            Exec APP on the saved image.

       -q, --quality NUM
            Image quality (1-100) high value means  high  size,  low  compression.  Default:  75.
            (Effect differs depending on file format chosen).

       -m, --multidisp
            For multiple heads, grab shot from each and join them together.

       -s, --select
            Interactively select a window or rectangle with the mouse.

       -t, --thumb NUM
            generate  thumbnail too. NUM is the percentage of the original size for the thumbnail
            to be.